Java Array to List toList(T... objects)

Description

return a list of objects from varargs.

License

BSD License

Parameter

Parameter	Description
T	template type of the objects
objects	a parameter

Return

the list or null if objects is null

Declaration

@SuppressWarnings("unchecked")
public static <T> List<T> toList(T... objects) 

Method Source Code

//package com.java2s;
/**//from   w  w  w.j a  v a 2  s.  c o  m
 * The OWASP CSRFGuard Project, BSD License
 * Eric Sheridan (eric@infraredsecurity.com), Copyright (c) 2011 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *    3. Neither the name of OWASP nor the names of its contributors may be used
 *       to endorse or promote products derived from this software without specific
 *       prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.util.ArrayList;

import java.util.List;

public class Main {
    /**
     * return a list of objects from varargs.  Though if there is one
     * object, and it is a list, return it.
     * 
     * @param <T>
     *            template type of the objects
     * @param objects
     * @return the list or null if objects is null
     */
    @SuppressWarnings("unchecked")
    public static <T> List<T> toList(T... objects) {
        if (objects == null) {
            return null;
        }
        if (objects.length == 1 && objects[0] instanceof List) {
            return (List<T>) objects[0];
        }

        List<T> result = new ArrayList<T>();
        for (T object : objects) {
            result.add(object);
        }
        return result;
    }
}

Related

1. toList(String[] array)
2. toList(T element, T... elements)
3. toList(T value)
4. toList(T... elements)
5. toList(T... items)
6. toList(T... objects)
7. toList(T[] _array)
8. toList(T[] anArrayToConvert)
9. toList(T[] arr)